Alas, as said Darell, it does not work with Bluez4 library, only Bluez3. So the application is useless, it does not detect any bluetooth receiver in the computer. I did not find any guide to easily port Bluez3 application to Bluez4.
This blog entry from a couple of years ago describes the problem:
http://blog.projectnibble.org/2010/08/08/how-ubuntus-broken-bluetooth-suppor...
In fairness, that blog entry indicates why bluetooth support in KDE4 has been problematic too.
In addition to the patch collection provided by Francois, this wiki provides some information about what might be needed to fix any ported kdebluetooth code:
http://wiki.openmoko.org/wiki/Manually_using_Bluetooth
Are there any bluez alternatives?
Seems other wrapper utilities are working with bluez 4, both GTK and KDE4. Perhaps we will need to study the code in some of those apps to port kdebluetooth to Trinity.
Darrell